How would restricting immigration work on people who are citizens because France decided to colonise and annex another country?
"Run, be free of the chains of colonialism! You don't have to go home, but you can't stay here."
IIRC, the French gave the countries back, usually with improvements like road systems, universities, working plumbing in the major cities.
It seems that most of the Muslim mouth frothing is driven by western immigration into their countries, not the other way around.
Yeah, not so much. There would first have to be immigrants from the West becoming permanent residents in Muslim countries. Not happening under most muslim countries' laws and the absolute number of Westerners (who have roots in the West) who want to do so are minuscule.
Could Europe and the US sustain their economies without emigration to Muslims countries? If we insist on them allowing us to go there, it seems a bit odd to demand they not come here.
We need zero immigrants from Muslim countries. That goes for America, certainly, and also for the rest of the West. Most muslim immigrants are net drains on the economy, what with the high level of welfare and other gov't services. Many of the well-educated muslims who are not a net drain are taking slots that would be filled by Americans in Med school, undergrad programs in engineering, etc. Universities like foreigners who pay full retail for their American education.
The Establishment had no business inviting an immiscible and hostile population into decent countries. The sooner they repatriate, the better.